在基于嵌套 SELECT 的 SQLite LIKE 子句中使用多个搜索条件

Question

I have a list of full-paths in the "SOURCE" table in SQLite and a list of specific filenames (which will obviously be part of the path) in a SPECIFICFILES table.

I want to find the files in the SOURCE table based on their filenames. I'm trying to use "LIKE" to match part of the path, but the search below returns nothing:

select * from SOURCE WHERE FullPath like (select char(39)||'%'||"SPECIFICFILES"."Filename"||'%'||char(39) FROM SPECIFICFILES);

(Char(39) is a quote in ASCII).

This query returns nothing. Is this possible in SQLite please or do I need to use C# to fire off each query in turn?

Adding some sample data:

Table SOURCE:
FullPath
C:\My Directory\MyFile.txt

Table SPECIFICFILES:
Filename
MyFile.txt

Answer 1

You can do it by joining the tables:

SELECT s.*, f.* 
FROM SOURCE s INNER JOIN SPECIFICFILES f
ON s.FullPath LIKE '%\' || f.Filename || '%';

I'm not sure why you used in your code CHAR(39) .
Is it part of the paths?
Also if the filename is at the end of FullPath , without any trailing \ , there is no need to concatenate the wildcard % at the end:

SELECT s.*, f.* 
FROM SOURCE s INNER JOIN SPECIFICFILES f
ON s.FullPath LIKE '%\' || f.Filename; 

See the demo .